Back button event on Cordova 1.5 - not triggering

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Robert Kern

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Mar 6, 2012, 8:56:26 PM3/6/12
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I have just updated to Cordova 1.5 and have found that the "backbutton" event no longer seems to get fired.

I can see this log message in LogCat (when debugging the app from Eclipse):

DroidGap(2354): WARNING: Back Button Default Behaviour will be overridden.  The backbutton event will be fired!

This indicates to me that the backbutton even has been registered properly.  The code i use to register the handler is:

document.addEventListener('backbutton', onBackKeyDown, true);

function onBackKeyDown(e) {
    console.log('back button pressed');
}

But the console message is never displayed.

I recall that there have been problems with the backbutton even in some previous versions of PhoneGap and wondered if this was something other people are experiencing, and if the PhoneGap/Cordova team are aware of it.

Thanks,

Robert

dhavaln

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Mar 12, 2012, 3:04:07 AM3/12/12
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Bryce Curtis

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Mar 13, 2012, 5:14:39 PM3/13/12
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Cordova is being re-initialized on every new page load, which will cause several problems - including the one you are experiencing.  I have a fix if you want to try it out...

In cordova-1.5.0.js, change

    channel.onNativeReady.subscribe(_self.boot);

to

    channel.onNativeReady.subscribeOnce(_self.boot);

If that solves the problem, then I will push the fix.

Thanks,
Bryce

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Robert Kern

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Mar 18, 2012, 10:46:07 PM3/18/12
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Hi Bryce,

Yes that change does seem to fix the back button issue.


Thanks!

Robert

Balakumar

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Mar 28, 2012, 6:19:57 PM3/28/12
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    Thanks Robert !


    Adding the below code to my cordova-1.5.0.js helped  me to fix the ajax issue.


    channel.onNativeReady.subscribe(_self.boot); 

    to 

    channel.onNativeReady.subscribeOnce(_self.boot); 





Brian Knorr

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Apr 4, 2012, 6:50:42 PM4/4/12
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This doesn't work for me at all.  Now the backbutton event never fires.

Roberto Martino

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Apr 8, 2012, 12:43:22 PM4/8/12
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try to move the registration of the "backbutton" event inside the funcion called by the "deviceready" event
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